Número de publicación WO2018115649 (A1)
Fecha de publicación: 28 de junio de 2018
Solicitante: NORIMAT
RESUMEN:
The present invention relates to a method for manufacturing a product in ceramic material, characterised in that it includes the following steps of: a/ mixing a ceramic powder with a powder of cerium sulphide pigment so as to obtain a homogeneous mixture of powders; and b/ flash sintering by heating the homogeneous mixture of powders via electric current pulses in a vacuum in order to densify said mixture, said sintering being carried out at a so-called predetermined sintering temperature of 950 °C to 1150 °C; said method comprising an intermediate step b1/ of heating said homogeneous mixture of powders according to a temperature profile comprising a first phase of increasing the temperature at a first rate A during a first time t1, and a second phase of increasing the temperature at a second rate B lower than the first rate A during a second time t2, until reaching the sintering temperature, which is then maintained during a time t3.
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